If you want to install
the 42go ISP-Manager
on the system you have to do the following steps because the 42go ISP-Manager
does not support White Box Linux / Red Hat Enterprise Linux 3.0 out of the box.
But because all paths/settings are similar to those on Red Hat 9 (which is supported
by the 42go ISP-Manager) you can make the installer of the 42go ISP-Manager
believe that the system is running Red Hat 9:

rm -f /etc/redhat-release

Now create a new
file /etc/redhat-release
with the following contents: